TM-9-2815-220-24

AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TM-9-2815-220-24 - Page 752 of 1563

TM 9-2815-220-24

SMOKE GENERATION SYSTEM REPLACEMENT

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REMOVAL (Continued)

NOTE

There are two configurations of the smoke generating system.

Early

systems use a dual solenoid configuration.

It was found that fuel,

trapped between the two solenoids and heated by the close proximity

of the exhaust, expanded and caused internal seals of the solenoids to

fail resulting in un-commanded smoke generation and higher fuel

consumption.

Newer, improved systems use a single solenoid system.

The newer system removes the two flywheel-end mounted solenoids

and incorporates a single solenoid at the damper end of the engine

where it is cooler.

Engineering Release Record (ERR) CO-M6185

authorizes converting to the single solenoid configuration.

10. Removal of components for the single solenoid system is done in the same manner as those on

the double solenoid system.

NOTE

Parts unique to the single solenoid smoke generation system are

underlined in the illustration below:

Manual shutoff valve (39).

Adapter (40) between manual shutoff valve and solenoid (20).

Elbow (41) between solenoid (20) and fuel line (6).

Mounting bracket (42).

Fuel line (43) located between bulkhead elbow (12) and

elbow fitting (19).

43

20

6

41

42

40

39

12

19

WP 0094 00-8